Micro Motion CNG050 Compressed Natural Gas Flow Meters

Product Data SheetPS-00408, Rev G

April 2020

Micro Motion™ CNG050 Compressed NaturalGas Flow Meters

Global industry standard for compressed natural gas metering

■ A single-meter solution specifically designed for use in both light and heavy duty vehicle dispensers

■ AGA 11-approved for the fiscal transfer of CNG

■ Micro Motion MVD™ Direct Connect™ technology for transmitter-less integration into dispenser headelectronics

■ Variety of transmitter options provide multivariable outputs to accommodate any dispenser designrequirements

■ Compact design with no moving parts, no special mounting or flow conditioning required

Micro Motion Compressed Natural Gas (CNG) flowmetersMicro Motion CNG050 meters are specifically designed for the CNG industry to meet the challenges of measuring compressednatural gas. The meter’s increased rangeability allows customers the flexibility to use the sensor for automobile or light- or heavy-duty vehicle dispenser designs.

Coriolis meters

Coriolis meters offer dramatic benefits over traditional volumetric measurement technologies. Coriolis meters:

■ Deliver accurate and repeatable process data over a wide range of flow rates and process conditions.

■ Provide direct inline measurement of mass flow and density, and also measure volume flow and temperature—all from a singledevice.

■ Have no moving parts, so maintenance costs are minimal.

■ Have no requirements for flow conditioning or straight pipe runs, so installation is simplified and less expensive.

■ Provide advanced diagnostic tools for both the meter and the process

CNG050 meters

The CNG050 meter was specifically designed for the CNG industry to meet the challenges of measuring compressed natural gas.The meter’s increased rangeability allows customers the flexibility to use the sensor for automobile or light- or heavy-duty vehicledispenser designs.

Micro Motion CNG050 meters feature integral transmitters, making them easy to install. Offered with Series 1000 and 2000transmitters with MVD technology, customers can choose either single or multivariable output configurations with milliamp, pulse,dual pulse, digital outputs, and an integral display.

Micro Motion MVD Direct Connect technology is making Coriolis flowmeters from Micro Motion even more suitable for CNGapplications. OEMs can benefit from MVD Direct Connect technology, which allows smart sensors to communicate directly withdispenser head electronics via Modbus—no transmitter is required.

Measurement principlesAs a practical application of the Coriolis effect, the Coriolis mass flow meter operating principle involves inducing a vibration of theflow tube through which the fluid passes. The vibration, though it is not completely circular, provides the rotating reference framewhich gives rise to the Coriolis effect. While specific methods vary according to the design of the flow meter, sensors monitor andanalyze changes in frequency, phase shift, and amplitude of the vibrating flow tubes. The changes observed represent the massflow rate and density of the fluid.

Mass and volume flow measurementThe measuring tubes are forced to oscillate producing a sine wave. At zero flow, the two tubes vibrate in phase with each other.When flow is introduced, the Coriolis forces cause the tubes to twist resulting in a phase shift. The time difference between thewaves is measured and is directly proportional to the mass flow rate. Volume flow rate is calculated from mass flow rate and thedensity measurement.

Watch this video to learn more about how a Coriolis flow meter measures mass flow and density (click the link and select ViewVideos): https://www.emerson.com/en-us/automation/measurement-instrumentation/flow-measurement/coriolis-flow-meters.

CNG050 Compressed Natural Gas Flow Meters April 2020

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https://www.emerson.com/en-us/automation/measurement-instrumentation/flow-measurement/coriolis-flow-meters

A. Inlet pickoff displacementB. No flowC. Outlet pickoff displacementD. TimeE. Inlet pickoff displacementF. With flow

G. Outlet pickoff displacementH. Time difference

I. Time

Vehicle fillingBecause of its clean combustion, CNG is increasingly used as a vehicle fuel in many parts of the world. Micro Motion CNG050meters used in dispenser stations are routinely verified (proved) against a gravimetric standard, the highest performance ratingpossible. In addition, the CNG050 meter can be used as a Master Meter standard, thus providing increased safety and eliminatingcumbersome scale setup and venting of gas.

Weights & Measures configuration lockoutFor applications that require Weights & Measures approval for legal trade (i.e., public CNG stations), order the Weights & Measuresconfiguration lockout software option for 2500 and 2700 transmitters with the CNG050 sensor. The configuration lockout softwareoption allows the transmitter to be changed from operating (secure) mode to configuration mode (and back again) using ProLink™

software. The transmitter will register flow only when in the operating (secure) mode. The transmitter will allow configurationchanges and zeroing of the meter only when in configuration mode.

When the configuration lockout option is ordered, a means is provided for physically sealing the transmitter housing.

The configuration lockout software option may not be required by certain world area Weights & Measures authorities. Theperformance of the CNG050 sensor is not affected by configuration lockout, and the sensor meets batch and accuracyspecifications with standard features.

Performance specifications

Typical CNG batch/dispensing conditionsFor determining the performance capabilities of our meters, the typical batch/dispensing conditions are defined as those where theflow rate is greater than 4 lbs/min (109 kg/hr).

April 2020 CNG050 Compressed Natural Gas Flow Meters

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Accuracy and repeatability

Performance specifications Value

Batch accuracy(1) ±0.50% of batch

Repeatability ±0.25% of rate

(1) In terms of percent of total batch delivered on CNG.

Flow range

Performance specification All models Standard volume(1)

lb/min kg/min SCFM Nm3 /hr

Flow range 2 to 220 1 to 100 40 to 4444 68 to 7550

(1) CNG with SG= 0.66 at 60 °F (16 °C) and 14.73 psia (1 bara).

Zero stabilityZero stability is used when the flow rate approaches the low end of the flow range where the meter accuracy begins to deviate fromthe stated accuracy rating, as depicted in the turndown section. When operating at flow rates where meter accuracy begins todeviate from the stated accuracy rating, accuracy is governed by the formula: accuracy = (zero stability/flow rate) x 100%.Repeatability is similarly affected by low flow conditions.

Performance specification All models Standard volume(1)

lb/min kg/min SCFM Nm3 /hr

Zero stability 0.02 0.009 18 8

(1) In terms of percent of total batch delivered on CNG.

Process pressure ratingsSensor maximum working pressure reflects the highest possible pressure rating for a given sensor with the process fitting asindicated. Fittings are rated to 5,800 psi (400 bar) — the Union SWG type fitting according to ASME B31.3, and the SAE fittingaccording to SAE J1453.

All sensors comply with Council Directive 2014/68/EU on pressure equipment.

The case was designed to protect the sensor components, but it is not rated for pressure containment. For added safety, the sensorhas a pressure relief feature to evacuate the case in the unlikely event of a loss of primary containment.

Table 1: Sensor maximum working pressure for all models

Component Rating

Flow tube 5,800 psi (400 bar)

Combined sensor and process fitting 5,800 psi (400 bar)

Union to NPT adapter piece(1) 4,600 psi (317 bar)

(1) Pressure rating of the additional adapter piece (#12 O-ring face seal to female NPT) that is provided with process connection option 239.


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Operating conditions: Environmental

Vibration limitsMeets IEC 60068-2-6, endurance sweep, 5 to 2000 Hz, 50 sweep cycles at 1.0 g.

Temperature limits

Component Limit

Process fluid temperature -40 °F (-40 °C) to 257 °F (125 °C)

Ambient temperature -40 °F (-40 °C) to 140 °F (60 °C)

Note■ In all cases, the electronics cannot be operated where the ambient temperature is below -40 °F (-40 °C) or above 140 °F (60 °C).

If a sensor is used where the ambient temperature is outside of the range permissible for the electronics, the electronics mustbe remotely located where the ambient temperature is within the permissible range.

■ Temperature limits may be further restricted by hazardous area approvals. Refer to the hazardous area approvalsdocumentation shipped with the sensor or available at www.emerson.com/flowmeasurement.

Operating conditions: Process

Pressure reliefThe sensor has a pressure relief feature to evacuate the case in the unlikely event of a loss of primary containment.

■ The pressure relief feature is located underneath the calibration tag.

AB

A. Pressure relief pathB. Calibration tag

■ The sensor must be oriented so that personnel and equipment will not be exposed to escaping pressurized discharge along thepressure relief path.

■ If the pressure relief feature is activated by a loss of primary containment, the calibration tag will release from the case.


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https://www.emerson.com/flowmeasurement

Hazardous area classifications

Approvals and certifications

Type Approval or certification (typical)

CSA and CSA C-US Class I, Div. 1, Groups C and D

CSA (Canada only) Class I, Div. 2, Groups A, B, C, and D

Class II, Div. 1, Groups E, F, and G

ATEX II 2 G Ex ib IIB/IIC T1-T5

II 2 D Ex ib IIIC T*°C Db IP65

NOTE: the H300 is Ex ib IIB; only withapproval option code 6 it is Ex ib IIC.

IECEx Ex ib IIC T1–T5

NEPSI Ex ib IIC T1–T5

Ingress Protection Rating IP 66/67 for sensors and transmitters

EMC effects Complies with EMC directive 2004/108/EC per EN 61326 Industrial

Complies with NAMUR NE-21 (09.05.2012)

Note■ Approvals shown are for the CNG050 meter configured with a 1000 or 2000 transmitter. Meters with integral electronics may

have more restrictive approvals. For details, refer to the transmitter Product Data Sheet.

■ When a meter is ordered with hazardous area approvals, detailed information is shipped along with the product.

■ More information about hazardous approvals, including detailed specifications and temperature graphs for all meterconfigurations is available on the CNG050 product page at www.emerson.com/flowmeasurement.

Industry standards

Type Standard

Weights & Measures forcustody transfer applications:

■ National Type Evaluation Program (NTEP)

■ PTB

■ NMI

■ Pattern approval

■ SIRIM

■ Ministry of Consumer Affairs

■ Ufficio Metrico Italiano

■ INMETRO

Industry standards andcommercial approvals

■ Pressure Equipment Directive (PED)

■ Canadian Registration Number (CRN)

■ Dual Seal

■ SIL2 and SIL3 safety certifications


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Transmitter interfaceCNG050 sensors are highly customizable to provide a configuration that is tailor-fit to specific applications.

Robust transmitter offerings allow a multitude of mounting options:

■ Compact mounting integral to the sensor

■ Field mount variants for harsh conditions

■ Compact control room DIN rail packages for optimal locating in a control cabinet

■ Specific fit-for-purpose solutions for two-wire connectivity or filling and dosing machinery integration

CNG050 sensors are available with an expansive selection of input and output connectivity options including the following:

■ 4-20 mA

■ HART™

■ WirelessHART™

■ DeviceNet

■ EtherNet/IP

■ Profinet

■ FOUNDATION™ fieldbus

■ PROFIBUS

■ Modbus®

■ Other protocols may be available on request

Physical specifications

Materials of constructionGeneral corrosion guidelines do not account for cyclical stress, and therefore should not be relied upon when choosing a wettedmaterial for your Micro Motion meter. For material compatibility information, refer to the Micro Motion Corrosion Guide.

Wetted part materials

Model All models

316L stainless steel

Sensor weight

CNG050 • 13 lb (6 kg)

Note■ Weight specifications are based upon Swagelok® compatible #12 VCO fitting flange and do not include electronics.

■ Heat jackets and steam kits are also available.

Non-wetted part materials

Component Enclosure rating 316L/CF-3Mstainless steel Polyurethane-paintedaluminum

Sensor housing —

Core processor housing NEMA 4X (IP66/67) • •


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Component Enclosure rating 316L/CF-3Mstainless steel Polyurethane-paintedaluminum

Junction box housing NEMA 4X (IP66) • •

1700/2700 transmitterhousing

NEMA 4X (IP66) • •

3700 transmitter housing NEMA 4X (IP66/67) •

Flanges

Sensor type Flange types

CNG050 ■ 3/4-inch NPT female Swagelok compatible size 12 VCO fitting

■ Swagelok compatible size 12 VCO union fitting

■ Union size 12 SAE fitting (universal thread)

NoteFor flange compatibility, please refer to the Online Store Sizing and Selection Tool at www.emerson.com/flowmeasurement.

DimensionsThese dimensional drawings are intended to provide a basic guideline for sizing and planning. They are representative of a sensorfitted with a Swagelok compatible size 12 VCO fitting and integral core processor.

Complete and detailed dimensional drawings can be found through the product link in our online store at www.emerson.com/flowmeasurement.

Note■ All dimensions ±0.118 in (±3.0 mm)

■ Representative of a sensor fitted with a Swagelok compatible size 12 VCO fitting and integral core processor.

Example dimensions for all models

16 3/8(416)

6 3/4(171)

2 15/16(75)

4 7/16(113)

4 3/8(111)


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NoteAll dimensions are in inches (mm).

Ordering informationUse this section to select the correct ordering codes for your configuration.

Example model code

The sensor is shipped with a model code stamp so that after purchase, you can verify the ordering codes described in this section.

A B C

C A A E Z Z Z290 N

G H I J

CNG050S

D E F

A. Sensor and modelB. Process connectionC. Case optionD. Electronics interfaceE. Conduit connectionF. Approval

G. LanguageH. Future option 1

I. Calibration optionJ. Factory option

Sensor base model

Code Case option

CNG050S Micro Motion Coriolis CNG-Series sensor; 0.5 in (13 mm); 316L stainless steel

Process connections

Code(1) Description

239 3/4-inch NPT female Swagelok compatible size 12 VCO fitting; 3/4-inch NPT female adapter O-ring face seal adapterrated to 4,600 psi (317 bar)

290 Swagelok compatible size 12 VCO union fitting; ready for face seal O-ring (not included)

291 Union size 12 SAE fitting (universal thread); ready for face seal O-ring (not included)

(1) Fittings listed here are standard options. Other types of fittings are available. Contact your local Micro Motion representative.

Case options

Code Case option

N Standard case


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Electronics interface

Code Electronics interface

Q 4-wire polyurethane-painted aluminum integral core processor for remote mount transmitters

A 4-wire stainless steel integral core processor for remote mount transmitters

C For integrally mounted 1700/2700 transmitter

W(1) Polyurethane-painted aluminum integral core processor for MVD Direct Connect installation

D(1) Stainless steel integral core processor for MVD Direct Connect installation

(1) When electronics interface W or D is ordered with approval codes C, A, Z, I, or P, an MVD Direct Connect I.S. barrier is supplied. No barrier issupplied when ordered with approval codes M or N.

Conduit connections

Code Conduit connection

Electronics interface codes Q, A, W and D

B 1/2-inch NPT — no gland

E M20 — no gland

F Brass/nickel cable gland (cable diameter 0.335 in (8.5 mm) to 0.394 in (10.0 mm))

G Stainless steel cable gland (cable diameter 0.335 in (8.5 mm) to 0.394 in (10.0 mm))

Electronics interface code C (integrally mounted 1700/2700)

B No gland

Approvals

Code Approval

M Micro Motion Standard (no approval)

N Micro Motion Standard / PED compliant

C CSA (Canada only)

A CSA C-US (U.S.A. and Canada)

Z ATEX — Equipment Category 2 (Zone 1) / PED compliant

I IECEx — Zone 1

P NEPSI; Available only with language code M (Chinese).

G Country Specific Approval – Requires a selection from the Approvals section of the “Certificate, Tests, Calibrationsand Services” model code option


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Languages

Code Language option

A Danish CE requirements document and English installation manual

D Dutch CE requirements document and English installation manual

E English installation manual

F French installation manual

G German installation manual

H Finnish CE requirements document and English installation manual

I Italian installation manual

J Japanese installation manual

M Chinese installation manual

N Norwegian CE requirements document and English installation manual

P Portuguese installation manual

S Spanish installation manual

W Swedish CE requirements document and English installation manual

B Hungarian CE requirements document and English installation manual

K Slovak CE requirements document and English installation manual

T Estonian CE requirements document and English installation manual

U Greek CE requirements document and English installation manual

L Latvian CE requirements document and English installation manual

V Lithuanian CE requirements document and English installation manual

Y Slovenian CE requirements document and English installation manual

Future option 1

Code Future option 1

Z Reserved for future use

Future option 2

Code Calibration option

Z Reserved for future use


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Measurement application software

Code Measurement application software option

Z No measurement application software

A Petroleum measurement; available with electronics interface codes W, D, Y and E; for electronic interface codes Q,A, V, B, C, select Petroleum

Factory options

Code Factory option

Z Standard product

X ETO product

R Restocked product (if available)

Certificates, tests, calibrations, and servicesThese option codes can be added to the end of the model code if needed, but no code is required when none of these options isselected.

NoteThere may be additional options or limitations depending on total meter configuration. Contact a sales representative beforemaking your final selections.

Material quality examination tests and certificates

Select any from this group.

Code Factory option

MC Material inspection certificate 3.1 (supplier lot traceability per EN 10204)

NC NACE certificate 2.1 (MR0175 and MR0103)

Radiographic testing

Select only one from this group.

Code Factory option

RE X-ray package 3.1 (radiographic examination certificate; weld map; radiographic inspection NDE qualification)

RT X-ray package 3.1 (radiographic examination certificate with digital image; weld map; radiographic inspection NDEqualification)

Pressure testing

Code Factory option

HT Hydrostatic test certificate 3.1


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Weld examination

Code Factory option

WP Weld procedure package (weld map, weld procedure specification, weld procedure qualification record, welderperformance qualification)

Special cleaning

Code Factory option

O2 Declaration of compliance oxygen service 2.1

Metrology compliance

Code Factory option

GR Russian GOST calibration verification certificate

Accredited calibration

Code Factory option

IC ISO17025 accredited calibration and certificates (9 points total)

Special calibration options

Select either none, CV, or CV with one of the additional verification point options.

NoteFor all special calibration options, the minimum flow rate for any verification point is 5% of sensor nominal flow rate.

Code Factory option

CV Custom verification (alter original verification points)

01 Add one additional verification point

02 Add two additional verification point

03 Add three additional verification point

06 Add up to six additional verification points

08 Add up to eight additional verification points

16 Add up to 16 additional verification points

Sensor completion options

Select any from this group.

Code Factory option

WG Witness general

SP Special packaging


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Country specific approvals

Select one from the following if approval code G is selected.

Code Factory option

R1 EAC Zone 1 – Hazardous Approval(1)(2)

B1 INMETRO Zone 1 – Hazardous Approval(1)(2)

(1) Only available with approval code G.(2) Not available with electronics code 0, 1, K, or L.


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PS-00408Rev. G

April 2020

Emerson Automation SolutionsWorldwide Headquarters7070 Winchester CircleBoulder, Colorado USA 80301T: +1 800-522-6277T: +1 303-527-5200F: +1 303-530-8459Mexico: +52 55 5809 5300Argentina: +54 11 4837 7000Brazil: +55 15 3413 8000Chile: +56 2 2928 4800Peru: +51 15190130

Emerson Automation SolutionsCentral Europe: +41 41 7686 111Eastern Europe: +41 41 7686 111Dubai: +971 4 811 8100Abu Dhabi: +971 2 697 2000Austria: +43 2236 607-0France: +33 (0) 800 917 901Germany: +49 (0) 2173 3348 0Italy: +39 8008 77334The Netherlands: +31 318 495 555Belgium: +32 2 716 77 11Spain: 900 901 983U.K. and Ireland: 0870 240 1978Russian/CIS: +7 495 995 9559

Emerson Automation SolutionsAustralia: (61) 3 9721 0200China: (86) 21 2892 9000India: (91) 22 6662 0566Japan: (81) 3 5769 6803South Korea: (82) 31 8034 0000Singapore: (65) 6 363 7766

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The Emerson logo is a trademark and service mark of Emerson Electric Co. Micro Motion, ELITE,ProLink, MVD and MVD Direct Connect marks are marks of one of the Emerson AutomationSolutions family of companies. All other marks are property of their respective owners.

Documents

Micro Motion CNG050 Compressed Natural Gas Flow Meters